Hello, Try
makeFunction <- function(x) eval( parse(text=x) ) name <- 'hdev' nlminb(c(9, 12), objective = makeFunction(name)) Hope this helps, Rui Barradas Em 04-07-2012 17:37, Freddy Hernández escreveu:
Hello I want to use the nlminb function but I have the objective function like characters. I can summarize the problem using the first example in the nlminb documentation. x <- rnbinom(100, mu = 10, size = 10) hdev <- function(par) -sum(dnbinom(x, mu = par[1], size = par[2], log = TRUE)) nlminb(c(9, 12), objective=hdev) With the last instructions we obtain appropriate results. If I have the name of the objective function stored in the element name, how can modify the next two instructions to obtain the same above results? name <- 'hdev' nlminb(c(9, 12), objective=name) Thanks for the reply. Freddy. -- View this message in context: http://r.789695.n4.nabble.com/About-nlminb-function-tp4635421.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
